SC18IS601 Philips Semiconductors, SC18IS601 Datasheet - Page 12

• Manufacturer Part Number: SC18IS601
• Description: (SC18IS600 / SC18IS601) SPI to IC-bus interface
• Manufacturer: Philips Semiconductors

NXP Semiconductors
SC18IS600_601_3
Product data sheet
Fig 12. Write N bytes to I
SPI host sends
COMMAND
SCLK
MOSI
0x00
CS
6.6.1 Write N bytes to I
6.6 SPI message format
OF BYTES
NUMBER
command 0x00
The SPI host issues the write command by sending a 0x00 command followed by the total
number of bytes (maximum 96 bytes excluding the address) to send and an I
device address followed by I
and ending with the last byte (data byte N). Once the SPI host issues this command, the
SC18IS600/601 will access the I
bytes.
When the I
on the INT pin, and the ‘transaction completed’ status can be read in I2CStat.
Note that the third byte sent by the host is the device I
SC18IS600/601 will ignore the least significant bit so a write will always be performed
even if the least significant bit is a ‘1’.
Fig 11. SPI single master multiple slaves configuration
2
C-bus slave device
SLAVE ADDRESS
+ W
number of bytes D[7:0]
2
C-bus write transaction has successfully finished, and interrupt is generated
master
2
Rev. 03 — 13 December 2006
BYTE 1
C-bus slave device
DATA
SPICLK
slave address A[7:1]
2
PORT
PORT
C-bus data bytes, beginning with the first byte (data byte 1)
2
C-bus slave device and start sending the I
BYTE N
DATA
MISO
MOSI
0
data byte 1
2
C-bus slave address. The
slave
slave
SCLK
CS
SCLK
CS
SC18IS600/601
SC18IS600/601
OTHER SPI
DEVICE
002aab717
SPI to I
data byte N
© NXP B.V. 2006. All rights reserved.
2
C-bus interface
2
2
C-bus data
002aab718
C-bus slave
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